Tamper proof closure

Claim 2

A tamper proof closure adapted for application to an open end container body and comprising: a center section; a peripheral channel having an inverted generally U-shaped cross section and including a base portion from which an inner leg and a flexible outer leg depend, with the lower end of the outer leg being free, the peripheral channel being formed integrally with the center section; a projecting bead on the outer leg and extending toward the inner leg, the bead being spaced apart from the free end of the outer leg and comprising a cam follower surface and an abutment surface; a plurality of apertures being provided in the outer leg about the periphery thereof, with the outer leg being continuous along its free end; and the continuous free end of the outer leg being severable to form, in conjunction with the plurality of apertures, a plurality of pivotable tabs, whereby the open end of the container body is receivable between the inner and outer legs and is lockingly engageable there-by.

Claim 3

A tamper proof closure adapted for application to an open end container body, the open end container body comprising a cylindrical side wall portion, a bottom wall portion formed integrally therewith, and said side wall portion having an annular ridge projection extending outwardly around the periphery of the open end, said annular ridge projection having the lower disposed surface substantially perpendicular to the cylindrical side wall portion, said tamper proof closure comprising: a center section; a peripheral channel having an inverted generally U-shaped cross section and including a base portion from which an inner leg and a flexible outer leg depend, with the lower end of the outer leg being free, the peripheral channel being formed integrally with the center section; a projecting bead on the outer leg and extending toward the inner leg, the bead being spaced apart from the free end of the outer leg to form an annular tool receiving recess below said bead and around the periphery of the free end of the outer leg, said bead comprising a cam follower surface and an abutment surface, said abutment surface being essentially flat and substantially perpendicular to the outer leg and said cam follower surface being formed at an angle to said outer leg; a plurality of apertures being provided in the outer leg about the periphery thereof, with the outer leg being continuous along its free end; and the continuous free end of the outer leg being severable in form, in conjunction with the plurality of apertures, a plurality of pivotable tabs; sealing means positioned on the lower surface of said base portion of said peripheral channel, said sealing means for sealably engaging with the upper surface of the periphery of the open end of the container body to form an air and liquid tight seal, whereby the open end of the cylindrical side wall portion of the container body is receivable between the inner and outer legs and the lower disposed surface of the annular ridge projection, is lockingly engaged by the abutment surface on the projecting bead and whereby a tool may be inserted into said tool receiving recess to sever said pivotable tabs to remove sAid closure.

Claim 4

A tamper proof closure adapted for application to an open end container body, the open end container body comprising a cylindrical side wall portion, a bottom wall portion formed integrally therewith, and said side wall portion having an annular ridge projection extending outwardly around the periphery of the open end, said annular ridge projection having the lower disposed surface substantially perpendicular to the cylindrical side wall portion, said tamper proof closure comprising: a center section; a peripheral channel having an inverted generally U-shaped cross section and including a base portion from which an inner leg and a flexible outer leg depend, with the lower end of the outer leg being free, the peripheral channel being formed integrally with the center section; a projecting bead on the outer leg and extending toward the inner leg, the bead being spaced apart from the free end of the outer leg to form an annular tool receiving recess below said bead and around the periphery of the free end of the outer leg, said bead comprising a cam follower surface and an abutment surface, said abutment surface being essentially flat and substantially perpendicular to the outer leg and said cam follower surface being formed at an angle to said outer leg; a plurality of apertures being provided in the outer leg about the periphery thereof, with the outer leg being continuous along its free end; and the continuous free end of the outer leg being severable in form, in conjunction with the plurality of apertures, a plurality of pivotable tabs; sealing means positioned on the lower surface of said base portion of said peripheral channel, said sealing means for sealably engaging with the upper surface of the periphery of the open end of the container body to form an air and liquid tight seal, whereby the open end of the cylindrical side wall portion of the container body is receivable between the inner and outer legs and the lower disposed surface of the annular ridge projection, is lockingly engaged by the abutment surface on the projecting bead and whereby a tool may be inserted into said tool receiving recess to sever said pivotable tabs to remove sAid closure.

Claim 5

A closure, as claimed in claim 2, wherein the outer leg is movable between a first position, wherein it is disposed generally parallel to the inner leg, and a second position, wherein it is generally outwardly bowed relative to the inner leg.

Claim 6

A closure, as claimed in claim 3, and further comprising means for normally retaining the pivotable tabs in a position corresponding substantially to the first position of the outer leg.

Claim 7

A closure, as claimed in claim 2, wherein the center section and the peripheral channel are annular.

Claim 8

A closure, as claimed in claim 2, wherein said sealing means comprises an annular compressable O-ring positioned within said peripheral channel.

Claim 9

A closure, as claimed in claim 2, wherein said sealing means comprises flexible annular finger protrusions formed integrally with the lower surface of said base portion of said peripheral channel and extending essentially perpendicularly from said base portion.

Claim 10

A closure, as claimed in claim 2, wherein the continuous free end of the outer leg is thickened relative to the other portions thereof.

Claim 11

A closure, as claimed in claim 2, which is fabricated from plastic.

Claim 12

A closure, as claimed in claim 4, wherein said means for manually retaining the pivotable tabs comprises a continuous annular ring integrally formed to the lower edge of the free end of said outer leg.